877861 has 4 divisors (see below), whose sum is σ = 892800. Its totient is φ = 862924.

The previous prime is 877853. The next prime is 877867. The reversal of 877861 is 168778.

It is a happy number.

877861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168778 = 2 ⋅84389.

It is a cyclic number.

It is not a de Polignac number, because 877861 - 2³ = 877853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 877861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (877867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7381 + ... + 7498.

It is an arithmetic number, because the mean of its divisors is an integer number (223200).

2⁸⁷⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

877861 is a deficient number, since it is larger than the sum of its proper divisors (14939).

877861 is a wasteful number, since it uses less digits than its factorization.

877861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14938.

The product of its digits is 18816, while the sum is 37.

The square root of 877861 is about 936.9423674912. The cubic root of 877861 is about 95.7506913670.

The spelling of 877861 in words is "eight hundred seventy-seven thousand, eight hundred sixty-one".